Diplomacy expansion: seiged cities, seiged cities should be able to negotiate and vice versa (u could negotiate with seige city... IF ur sieging the city of course) and that u shoudl be able to give or ask for besieged cities if u are the person seiging etc.... also if ur next to sea u should be able to get out from the sea or reinforcement enter from sea.... troops outside of their faction provinces should cost extra to maintain.